JP2002028857A - Angle grinding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an angle grinding device capable of extremely facilitating attaching/detaching of a grinding wheel, shortening attaching/detaching time by tens of seconds and safely performing angle grinding. SOLUTION: This angle grinding device 1 for supporting and rotating the grinding wheel 2 at a desired angle and forming a flat surface of an arbitrary angle on a workpiece 50 is provided with a grinding wheel arranging part 3 for arranging the grinding wheel 2, a grinding wheel mounting part 5 provided on the grinding arranging part 3 and having a first screwing part 4 and the grinding wheel 2 having a second screwing part 6 constituted so as to be screwing possible or screwing releasable with the first screwing part 4 and so as to be attachable/detachable to/from the grinding wheel mounting part 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an angle grinding apparatus suitable for forming a flat surface at a desired angle on a block material such as a tile, a stone or a brick.

[0002]

2. Description of the Related Art For example, an L-shaped accessory tile for decorating a corner of a building usually forms an inclined surface by grinding one side of each of two tiles, and joins the inclined surfaces. Be composed. The angle grinding apparatus of the present invention is used when forming such a flat surface of a desired angle on a block material such as a tile, a stone, or a brick,
A whetstone attaching / detaching mechanism that can be replaced according to wear of the whetstone is provided.

[0003] As a conventional grindstone attaching / detaching mechanism in this angle grinding apparatus, a grindstone arranging portion provided on the machine side, a metal disk (grinding wheel attaching portion) for fixing to the grindstone arranging portion, and a grindstone attached to the metal disk And a type in which the whetstone is fixed to the metal plate with an adhesive, and the bolt is attached to the whetstone placement part by bolts.The metal disk is always fixed to the whetstone placement part, and the whetstone is bolted to the metal plate. There was a type of tightening and mounting.

[0004]

However, in the former mechanism, since the total weight of the metal plate and the grindstone is about 15 kg, the attaching / detaching operation itself is heavy labor, and it takes time and effort to tighten or remove bolts. On the other hand, the latter also requires bolting or removing bolts for attaching and detaching whetstones,
It took about 5 to 8 minutes and time. In addition, a plurality of bolts are arranged at symmetrical positions between different materials of the metal plate and the grindstone, and are firmly connected. However, depending on the fixing condition, an unbalanced clearance may be generated between the two, and about 8 kg. There is a danger that the heavier grindstone may come off from the grindstone mounting part during high-speed rotation, which is extremely dangerous.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an angle grinding apparatus which can extremely easily attach and detach a grindstone, shorten the time for desorption and attach to a few tens of seconds, and perform angle grinding safely, and a grindstone used therefor. It is in.

[0006]

An object of the present invention is to provide an angle grinding apparatus for forming a flat surface of an arbitrary angle on a workpiece by supporting and rotating a grindstone at a desired angle. A whetstone disposition portion for disposing the whetstone, a whetstone mounting portion provided on the whetstone disposition portion and having a first screw portion, and capable of being screwed on or released from the first screw portion. An angle grinding device comprising: a whetstone having a second screwing portion that is configured to be detachable from the whetstone mounting portion.

[0007] It is preferable that the whetstone mounting portion has the whetstone mounted on one surface side and a convex portion for adjusting the rotational balance on the other surface side. The convex portion is attached along the edge of the other side of the whetstone mounting portion at a position where the rotation balance can be adjusted with the whetstone attached to the whetstone mounting portion, and the rotation balance can be adjusted. It is preferable to be constituted by a plate member having a weight.

Another object of the present invention is to provide a grindstone arranging portion for arranging a grindstone, and a grindstone attaching portion provided on the grindstone arranging portion and having a first screwing portion. A grindstone attached to an angle grinding device for supporting and rotating at a desired angle to form a flat surface at an arbitrary angle on a work, wherein the grindstone is screwed with a first threaded portion of the grindstone mounting portion. A grindstone characterized by having a second screwing portion which is configured to be able to be engaged or unfastened and is detachable from the whetstone mounting portion.

The first threaded portion of the whetstone mounting portion is configured as a female threaded portion, the second threaded portion of the whetstone is configured as a male threaded portion, and the male threaded portion is It is preferable that the grinding stone is formed of a hard material and is fixed to one end surface of the grinding wheel.

In the angle grinding apparatus according to the present invention, the work of attaching and detaching the grindstone is performed by screwing or screwing the first screw portion provided on the grindstone mounting portion and the second screw portion provided on the grindstone. Since it is only released, the attaching and detaching of the grindstone is extremely easy and the demounting time can be reduced to several tens of seconds, and the grindstone is detached from the device during high-speed rotation because the grindstone mounting portion and the grindstone are integrally connected. Therefore, angle grinding can be performed very safely.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an angle grinding apparatus according to the present invention and a grindstone used in the apparatus. FIG. 1 is a schematic perspective view of an embodiment of the angle grinding apparatus of the present invention, FIG. 2 is a schematic perspective view of the vicinity of a work arrangement portion in the angle grinding apparatus shown in FIG. 1, and FIG. FIG. 4 is a plan view of one side of a grinding wheel mounting portion in the angle grinding device, and FIG. 4 is a sectional view taken along line AA of FIG.
6 is a plan view of the other side, FIG. 6 is a plan view of one side of the grinding wheel in the angle grinding device shown in FIG. 1, and FIG.
8 is a cross-sectional view taken along the line BB in FIG. 8, and FIG.

The angle grinding apparatus 1 of this embodiment is an angle grinding apparatus for supporting the grindstone 2 at a desired angle and rotating the grindstone 2 to form a flat surface of an arbitrary angle on the work 50. A grindstone disposing portion 3, a grindstone attaching portion 5 provided on the grindstone disposing portion 3 and having a first screwing portion 4, and a grindstone mounting member configured to be screwable or unscrewable with the first screwing portion 4. And a grindstone 2 having a second screwing portion 6 detachable from the portion 5, and has a feature in a mechanism for attaching and detaching the grindstone 2 to and from the device for grinding the work 50. Hereinafter, each configuration will be described in detail.

The grindstone placing portion 3 is a portion for placing the grindstone 2 in the angle grinding device 1, and is arranged in a horizontal direction in the angle grinding device 1 of this embodiment as shown in FIG. Two grindstone arrangement portions 3a and 3b are provided.

More specifically, each of the grindstone arranging portions 3a and 3b has a shaft member 7 provided therein so as to be able to rotate at a high speed (1800 rpm), and these shaft members 7 are used as angle setting handles 8a and 8b. By the rotation operation, the axial direction can be appropriately set and changed between 0 ° (horizontal direction) and 90 ° (vertical direction).

Then, on the tip side of the shaft member 7,
The whetstone mounting portions 5a and 5b having the first screwing portions 4 shown in FIGS. 3 and 4 are mounted. These grindstone attachment portions 5a and 5b are portions for attaching grindstones 2a and 2b, respectively, which will be described later. In this embodiment, the grindstone attachment portions 5a and 5b are formed of a disk-shaped metal plate.

Specifically, the whetstone mounting portions 5a, 5b
By tightening the two bolts, the grinding wheel
a, 3b are fixed to the shaft member 7 and the grindstones 2a, 2b
Is provided with a first screwing portion 4 on one surface 5A to which is attached.

As shown in FIG. 3, the first screwing portion 4 is integrally provided along the circumference of the one side 5A of the grinding wheel mounting portion 5, and more specifically, as shown in FIG. As shown in the figure, the screw is formed so that its inner diameter is reduced toward the outside in a spiral shape (so that the outside is the crest of the screwing portion), and the entire female surface of the one side 5A board is female-type screwed. Unit.

The whetstone mounting portion 5 has a shaft member insertion hole 9 at the center thereof. When the whetstone mounting portion 5 is fixed to the shaft member 7 of the whetstone placing portion 3, the shaft member 7 is inserted into the shaft member insertion hole 9. In a state where a part of the shaft member 7 is inserted, a bolt 11 is inserted into the bolt insertion hole 10 to be securely fastened to the distal end side of the shaft member 7.

Further, as shown in FIG. 5, the grinding wheel mounting portion 5 has a convex portion 1 for adjusting the rotational balance on the other surface 5B.
2 is provided. By providing the first screwing portion 4 on the one surface side 5A, the convex portion 12 has a weight imbalance with respect to a center point existing at the center of the grinding wheel mounting portion 5,
This is to correct the imbalance and improve the balance during rotation. Therefore, strictly speaking, it is preferable that the convex portion 12 can adjust the rotational balance in a state where the grindstone 2 is mounted on the grindstone mounting portion 5.

In this embodiment, the convex portion 12 is constituted by an arcuate member which is curved along an end near the circumference of the other surface 5B, and the first screw portion 4 is the most. It is provided on the rear side surface (the other surface side 5B) in the vicinity of becoming smaller. The protrusion 12 has a weight that compensates for the weight imbalance to correct the weight imbalance.

In this embodiment, the projection 12 is provided on the other side 5.
B is configured by attaching a plate-shaped member at one location, but may be provided at a plurality of locations separately.
Or, at a position symmetrical with respect to the center point,
What is substantially the same as the first screwing portion 4 provided in A may be formed on the other surface 5B.

The grindstone 2 is for forming a flat surface at a desired angle on the work 50, and is used by being attached to one side 5A of the grindstone mounting portion 5 as shown in FIG. Specifically, as shown in FIG. 6, a second screwing portion 6 configured to be screwable or unscrewable with the first screwing portion 4 is provided on one end surface side 2A of the grindstone 2. The first screw portion 4 and the second screw portion 6 are engaged with each other, so that the grindstone 2 is attached to the grindstone mounting portion 5 and the other end surface 2
The workpiece 50 can be angle-ground by B.

More specifically, the grindstone 2 of this embodiment is
As shown in FIG. 7, the second screwing portion 6 is spirally formed along the inner periphery of the one end surface 2A of the grindstone 2 and its outer diameter gradually decreases toward the one end surface 2A. (An end surface side 2A side is a valley of a screw portion), and a male screw portion is formed on the one end surface side 2A.

In FIG. 8, when the grindstone 2 is rotated in the direction of arrow H, the first screw portion 4 and the second screw portion 6 are screwed into a mounted state, and turned in the direction of arrow L. When it is moved, the screw engagement between the two is released, and it is configured to be able to be removed from the whetstone mounting portion 5.

The main body of the grindstone 2 of this embodiment is formed of a grindstone (for example, silicon carbide) and a binder (for example, resinoid, vitrified, rubber, etc.). Is a material containing a hard resin,
It is formed of a material containing metal or a hard material such as metal. As described above, by forming the second screw portion 6 with a hard material different from the material for forming the grindstone 2,
Angle grinding can be performed more safely without breaking the second screw portion 6. In addition, although what kind of thing may be used as a hard resin, polystyrene etc. can be used suitably, for example.

The second screwing portion 6 is fixed to the one end surface 2A of the grindstone 2 with an adhesive. As shown in FIG. 7, the material of the second screwing portion 6 is a grindstone. 2 one end face 2A
It is preferable that the curing is performed in a state where the small holes 2c provided on the side are partially filled. Thereby, the fixing strength between the second screw portion 6 made of a different material and the grindstone 2 is increased, and the second screw portion 6 and the grindstone main body can be further prevented from being separated during high-speed rotation.

Next, an angle grinding apparatus of the present invention and a method of using a grindstone used therein will be described. When the angle grinding apparatus 1 of the present invention is used, first, the work 50 to be ground is placed in the work placement unit 13 as shown in FIG.
Are arranged on the platen 14. The work arrangement unit 13 has a surface plate 14 for arranging the works 50, a work pressing means 15 for pressing the works 50 from above, and a drive cylinder 16 for driving the work pressing means 15. ing.

Next, the angle of the flat surface formed on the workpiece 50 is set by rotating the angle setting handles 8a and 8b. Further, the grindstone 2 is mounted on each of the grindstone arrangement sections 3a and 3b. This mounting operation is performed with respect to the first screwing portion 4 of the grindstone mounting portions 5a and 5b fixed to the shaft member 7 in advance.
Only the second screwing portion 6 of the grindstone 2 is meshed, and can be performed in several tens of seconds.

In this state, when the shaft member 7 is driven to rotate at a high speed in the L direction (a direction in which the first screw portion and the second screw portion are tightened), the work placement portion 13 is rotated. Moves in the horizontal direction, and the work 50 is ground to a desired set angle by the grindstone 2. When the grindstone 2 is worn, the grindstone 2 can be removed extremely easily and in a short time by rotating the grindstone 2 in a direction opposite to the direction in which the grindstone 2 is mounted.
Then, a new grindstone 2 is mounted as described above, and the grindstone can be easily replaced.

[0030]

According to the first aspect of the present invention, it is possible to extremely easily attach and detach the grindstone, shorten the mounting / detaching time to several tens of seconds, and perform angle grinding safely. According to the invention described in claim 2, high-speed rotation is made stable,
Angle grinding can be performed more safely. According to the third aspect of the invention, the effect of the second aspect can be realized with a simple and extremely effective structure. According to the invention as set forth in claim 4, the attachment and detachment of the grindstone is extremely easy, the attachment / detachment time can be reduced to several tens of seconds, and the angle grinding can be performed safely. According to the invention described in claim 5, the strength of the second screw portion can be increased, and the angle grinding can be performed more safely without breaking the second screw portion.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an embodiment of an angle grinding apparatus according to the present invention.

FIG. 2 is a schematic perspective view of the vicinity of a work arrangement portion in the angle grinding device shown in FIG.

FIG. 3 is a plan view of one surface side of a grindstone mounting portion in the angle grinding device shown in FIG. 1;

FIG. 4 is an end view taken along line AA of FIG. 3;

FIG. 5 is a plan view of the other side of the grinding wheel mounting portion in the angle grinding device shown in FIG. 1;

FIG. 6 is a plan view of one end surface of a grindstone in the angle grinding device shown in FIG. 1;

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

FIG. 8 is a perspective view for explaining a method of attaching and detaching a grindstone according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Angle grinding apparatus 2 Grinding stone 3 Grinding stone arrangement part 4 First screwing part 5 Grinding stone attaching part 6 Second screwing part 7 Shaft member 8 Angle adjustment handle 9 Shaft member insertion hole 10 Bolt insertion hole 11 Bolt 12 Convex part 13 Work arrangement part 14 Surface plate 15 Work pressing means 16 Drive cylinder

Claims (5)

[Claims] 1. An angle grinding device for supporting and rotating a grindstone at a desired angle to form a flat surface at an arbitrary angle on a work, wherein the angle grinder is a grindstone arrangement unit for arranging the grindstone. A whetstone mounting portion provided on the whetstone disposition portion and having a first screwing portion; and being configured to be screwable or unscrewable with the first screwing portion and detachable from the whetstone mounting portion. An angle grinding device comprising: the grinding wheel having a second screw portion. 2. The angle grinding apparatus according to claim 1, wherein the whetstone mounting portion has the whetstone mounted on one surface side and a convex portion for adjusting rotation balance on the other surface side. 3. The whetstone mounting portion is mounted along the other surface side end of the whetstone mounting portion at a position where the rotational balance can be adjusted in a state where the whetstone is mounted on the whetstone mounting portion, and is rotated. 3. The angle grinding device according to claim 2, wherein the angle grinding device is constituted by a plate-shaped member having a weight capable of adjusting the balance. 4. A grindstone arranging portion for arranging a grindstone, and a grindstone attaching portion provided on the grindstone arranging portion and having a first screwing portion, and supporting and rotating the grindstone at a desired angle. A grindstone used by being attached to an angle grinding device for forming a flat surface at an arbitrary angle on a work, wherein the grindstone can be screwed or unthreaded with a first threaded portion of the grindstone mounting portion. Characterized in that the grinding wheel has a second screwing portion which is detachable from the grinding wheel mounting portion. 5. The whetstone mounting portion has a first threaded portion configured as a female threaded portion, while the second threaded portion of the whetstone is configured as a male threaded portion. The grinding wheel according to claim 4, wherein the screw portion is formed of a hard material and is fixed to one end surface of the grinding wheel.